Ever thought about SFS? After 10k you can get pretty good results with SFS.
A friend of mine had before 8 months only 70k follower on luxury/fashion niche. Now after several sfs PER DAY(she was/is very active) she gained without any payment and botting 160k (shes at 234k now).
Post good content, keep up the work. Try to have a low k/d (simply like the word ^^, of course i mean, have a low followers/following rate, don't follow more then 200 accs).
Keep posting everyday. Use some picture descriptions like: Tag your best mate which whom you would drive this baby.
Think smart, how could you bring others to tag their friends?
Or how could you gain more?
Maybe create a website too, change name to something really catchy, make it look like it's some company stuff.
I build an IG with fashion niche, added a website with tumblr bot, run an IG bot, made several sfs, and gained from scratch within 1 week 2k followers!
Thank you for your thoughtful advice! I haven't tried SFS due to the fact that it's quite hard to contact or find a person that actually responses to DMs, maybe I'll scout shoutout websites like shoutcart and on this forum. I have experimented with tag your mates, but my engagement is really low and it doesn't get any tags and it looks ridiculous. From now I might just stick to using FL to bot follow/unfollow and search for some SFS.